Can I use Mailtrap as a CLI?

Yes. KosmoKrator exposes a Mailtrap CLI through kosmo integrations:call and the provider shortcut command. Commands can return JSON for scripts, CI, and coding agents.

Can I expose Mailtrap through MCP?

Yes. The KosmoKrator MCP gateway can expose selected Mailtrap tools to clients such as Claude Code, Cursor, Codex, and other MCP-compatible tools.

Where are Mailtrap credentials stored?

Mailtrap credentials are configured in KosmoKrator's local integration settings and reused by CLI, Lua, and MCP gateway surfaces.

Can I deny write access for Mailtrap MCP tools?

Yes. Start the gateway with --write=deny for read-only clients, or use ask/allow only for trusted workspaces.

productivity

Mailtrap CLI for AI Agents

Use the Mailtrap CLI from KosmoKrator to call Mailtrap tools headlessly, return JSON, inspect schemas, and automate workflows from coding agents, scripts, and CI.

Mailtrap CLI Setup

Mailtrap can be configured headlessly with `kosmokrator integrations:configure mailtrap`.

Install, configure, and verify

# Install KosmoKrator first if it is not available on PATH.
curl -fsSL https://raw.githubusercontent.com/OpenCompanyApp/kosmokrator/main/install.sh | bash

# Configure and verify this integration.
kosmokrator integrations:configure mailtrap --set api_token="$MAILTRAP_API_TOKEN" --enable --read allow --write ask --json
kosmokrator integrations:doctor mailtrap --json
kosmokrator integrations:status --json

Credentials

Authentication type: API token api_token. Configure credentials once, then reuse the same stored profile from scripts, coding CLIs, Lua, and MCP.

Key	Env var	Type	Required	Label
`api_token`	`MAILTRAP_API_TOKEN`	Secret `secret`	yes	API Token

Command Patterns

The generic command is stable across every integration. The provider shortcut is shorter for humans.

Generic CLI call

kosmo integrations:call mailtrap.mailtrap_list_inboxes '{}' --json

Provider shortcut

kosmo integrations:mailtrap mailtrap_list_inboxes '{}' --json

Discovery

These commands return structured output for coding agents that need to inspect capabilities before choosing a function.

Discovery commands

kosmo integrations:docs mailtrap --json
kosmo integrations:docs mailtrap.mailtrap_list_inboxes --json
kosmo integrations:schema mailtrap.mailtrap_list_inboxes --json
kosmo integrations:search "Mailtrap" --json
kosmo integrations:list --json

Automation Contexts

The same configured command surface works in these environments. The command does not change unless the host wrapper, credentials, or permissions change.

CI Run integration calls from CI jobs with JSON output, explicit credentials, and predictable exit status. Cron Jobs Schedule repeatable integration workflows from cron while keeping credentials in KosmoKrator config. Shell Scripts Call integration functions from shell scripts with stable JSON input and output. Headless Automation Use KosmoKrator as a non-interactive integration runtime for local automations and wrappers. Coding Agents Let coding agents discover schemas and execute integration functions through CLI commands or MCP.

CLI Functions

Every function below can be called headlessly. Commands are highlighted, copyable, and scroll horizontally when payloads are long.

`mailtrap.mailtrap_list_inboxes`

List all inboxes in the Mailtrap account. Returns inbox IDs, names, and email addresses.

Read read

Parameters: none

Generic call

kosmo integrations:call mailtrap.mailtrap_list_inboxes '{}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_list_inboxes '{}' --json

`mailtrap.mailtrap_get_inbox`

Get details for a specific Mailtrap inbox by ID, including its email address, settings, and message counts.

Read read

Parameters: inbox_id

Generic call

kosmo integrations:call mailtrap.mailtrap_get_inbox '{"inbox_id":1}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_get_inbox '{"inbox_id":1}' --json

`mailtrap.mailtrap_list_messages`

List messages in a Mailtrap inbox with optional search and pagination.

Read read

Parameters: inbox_id, page, per_page, search

Generic call

kosmo integrations:call mailtrap.mailtrap_list_messages '{"inbox_id":1,"page":1,"per_page":1,"search":"example_search"}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_list_messages '{"inbox_id":1,"page":1,"per_page":1,"search":"example_search"}' --json

`mailtrap.mailtrap_get_message`

Get a single message from a Mailtrap inbox by its ID, including subject, sender, recipient, and body.

Read read

Parameters: inbox_id, message_id

Generic call

kosmo integrations:call mailtrap.mailtrap_get_message '{"inbox_id":1,"message_id":1}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_get_message '{"inbox_id":1,"message_id":1}' --json

`mailtrap.mailtrap_send_test_email`

Send a test email through Mailtrap. Provide sender, recipient(s), subject, and either text or HTML body.

Write write

Parameters: from, to, subject, text, html, inbox_id

Generic call

kosmo integrations:call mailtrap.mailtrap_send_test_email '{"from":"example_from","to":"example_to","subject":"example_subject","text":"example_text","html":"example_html","inbox_id":1}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_send_test_email '{"from":"example_from","to":"example_to","subject":"example_subject","text":"example_text","html":"example_html","inbox_id":1}' --json

`mailtrap.mailtrap_list_suppressions`

List suppressions (blocked recipients) for a Mailtrap inbox.

Read read

Parameters: inbox_id, page, per_page

Generic call

kosmo integrations:call mailtrap.mailtrap_list_suppressions '{"inbox_id":1,"page":1,"per_page":1}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_list_suppressions '{"inbox_id":1,"page":1,"per_page":1}' --json

`mailtrap.mailtrap_get_current_user`

Get the current Mailtrap user profile and account info. Useful as a health check.

Read read

Parameters: none

Generic call

kosmo integrations:call mailtrap.mailtrap_get_current_user '{}' --json

Shortcut

kosmo integrations:mailtrap mailtrap_get_current_user '{}' --json

Function Schemas

Use these parameter tables when building CLI payloads without calling integrations:schema first.

mailtrap.mailtrap_list_inboxes 0 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_list_inboxes --json

Parameter	Type	Required	Description
No parameters.

mailtrap.mailtrap_get_inbox 1 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_get_inbox --json

Parameter	Type	Required	Description
`inbox_id`	integer	yes	The inbox ID.

mailtrap.mailtrap_list_messages 4 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_list_messages --json

Parameter	Type	Required	Description
`inbox_id`	integer	yes	The inbox ID to list messages from.
`page`	integer	no	Page number for pagination (1-based).
`per_page`	integer	no	Number of messages per page (default: 25).
`search`	string	no	Search query to filter messages by subject, from, or to.

mailtrap.mailtrap_get_message 2 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_get_message --json

Parameter	Type	Required	Description
`inbox_id`	integer	yes	The inbox ID.
`message_id`	integer	yes	The message ID.

mailtrap.mailtrap_send_test_email 6 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_send_test_email --json

Parameter	Type	Required	Description
`from`	object	yes	Sender object with "email" and optionally "name". E.g. {email = "me@example.com", name = "Me"}.
`to`	array	yes	Array of recipient objects, each with "email" and optionally "name".
`subject`	string	yes	Email subject line.
`text`	string	no	Plain text email body.
`html`	string	no	HTML email body.
`inbox_id`	integer	no	Inbox ID to send from (required for Testing inbox type).

mailtrap.mailtrap_list_suppressions 3 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_list_suppressions --json

Parameter	Type	Required	Description
`inbox_id`	integer	yes	The inbox ID.
`page`	integer	no	Page number for pagination (1-based).
`per_page`	integer	no	Number of results per page.

mailtrap.mailtrap_get_current_user 0 parameters

Schema command

kosmo integrations:schema mailtrap.mailtrap_get_current_user --json

Parameter	Type	Required	Description
No parameters.

Permissions

Headless calls still follow the integration read/write permission policy. Configure read/write defaults with integrations:configure. Add --force only for trusted automation that should bypass that policy.